Prognostic Meteorological Discussion
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000
FXUS01 KWBC 210656
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
256 AM EDT TUE OCT 21 2014

VALID 12Z TUE OCT 21 2014 - 12Z THU OCT 23 2014

***ACTIVE WEATHER PATTERN ACROSS THE PACIFIC NORTHWEST***

***SCATTERED SHOWERS AND STORMS FROM TEXAS TO THE UPPER MIDWEST***

***BAD WEATHER FOR THE NORTHEAST U.S. THROUGH MIDWEEK***

AN ACTIVE WEATHER PATTERN CONTINUES ACROSS THE NORTHWEST CORNER OF
THE U.S. AS A COLD FRONT APPROACHES THE COAST ON WEDNESDAY
MORNING.  AN ATMOSPHERIC RIVER OF MOISTURE IS EXPECTED JUST AHEAD
OF THIS FRONT, AND THIS WILL RESULT IN MODERATE TO HEAVY RAINFALL
FROM WESTERN OREGON AND EXTENDING NORTHWARD INTO BRITISH COLUMBIA.
 ACROSS THE HIGHER ELEVATIONS OF WESTERN WASHINGTON, WESTERN
MONTANA, AND CENTRAL IDAHO, MEASURABLE SNOWFALL IS LIKELY ACROSS
THE HIGHER ELEVATIONS.

PARTS OF SOUTHERN NEW MEXICO AND WESTERN TEXAS CONTINUE TO HAVE
CHANCES FOR SCATTERED THUNDERSTORMS EACH AFTERNOON AND EVENING
THROUGH MIDWEEK AS AN UPPER LEVEL DISTURBANCE AND ITS ASSOCIATED
INSTABILITY REMAINS OVER THE REGION.  A COLD FRONT CROSSING OVER
THE CENTRAL PLAINS BY WEDNESDAY AFTERNOON AND INTO THURSDAY IS
EXPECTED TO DRAW SOME OF THIS MOISTURE NORTHWARD TOWARDS THE UPPER
MIDWEST.

THINGS GET INTERESTING FOR NEW ENGLAND AND UPSTATE NEW YORK AS A
NOR`EASTER DEVELOPS OVER THE COASTAL WATERS OF THE ATLANTIC.  AN
UPPER LEVEL DISTURBANCE IS EXPECTED TO DROP ACROSS THE GREAT LAKES
INTO THE NORTHEAST, WHICH WILL RESULT IN THE DEVELOPMENT OF THIS
STORM SYSTEM.  THE HEAVIEST RAINFALL IS EXPECTED PRIMARILY
NORTHEAST OF PHILADELPHIA AS MOISTURE IS ADVECTED NORTHWARD FROM
THE ATLANTIC OCEAN.  A FEW INCHES OF RAINFALL IS POSSIBLE BY
THURSDAY MORNING OVER NEW ENGLAND BEFORE THE STORM DEPARTS.  GUSTY
WINDS AND ROUGH SURF ARE ALSO EXPECTED.

HAMRICK


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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